Serious problems root/unroot PLZ help!!!

So my story begins with me rooting my Moto Droid 1 running 2.2.1 frg83d,I used this guide (http://www.droidforums.net/forum/droid-labs/74028-root-droid-1-regardless-os-version.html) It was pretty easy, and worked great. Then a week later tragedy struck, my screen suddenly stopped working. I was able to view what was on the screen by using Android screen monitor (on my computer). So i called Verizon and my warranty covered it. My first problem is that now i cant unroot the old droid. For some reason when i boot to recovery, Android screen monitor does not show the recovery screen. And I need to send it back in a day or two. My second problem is that when i got the new droid, 2.2.2 automatically installed itself and i can not root it using the same guide. I got as far as rebooting into SPrecovery to install "update.zip", but every time i try it automatically goes to the bricked droid screen instead of SPrecovery. Can anybody lend some support? I'm running out of time.